Question

Calculate the viscous force on as a rain drop of
diameter 1mm faling with
a uniform velocity 2m/s
through air. The coefficient of viscosity of all
1.8 x 10 5 Ns/m²​

Answer 1

Explanation:

Viscous force F=6πηrv

So, F=6π×1.8×10 -4×0.2×10 −3×2

⟹ F=1.36×10 −6 N.

Hope this is the right answer...